More questions than answers (*SPOILERS*)
Why did Kasper allow filmmakers to film him committing crimes in the first place?
Perhaps because he was using the filmmakers: he wanted the cops to see it. This might imply that his death was faked, or at least that he was planning some other way of pushing the filmmakers to turn in the footage as evidence. If so, why? To fake his own death? That surely wasn't necessary, since he had a low profile already---the cops didn't know who he was. If it was fake, then there had to be a payload among the misinformation: the evidence of the crimes themselves?
(Come to that, why would the filmmakers incriminate themselves by creating video evidence of themselves aiding and abetting burglaries: To me this is where the plot requires the biggest suspension-of-disbelief, that they could even be that stupid.)
Why rob Slick's?
If the purpose of the exercise is to fake Kasper's death, then this puts a motive (Uschev's revenge) on record.
Was Slick's a fake job (i.e. done with Uschev's knowledge)?
If so, what does Uschev get out of any of this? Was he the prime mover of all of this? His refusal to talk tells us nothing: he was clearly a dodgy mafia type who would not have had dealings with the police, insurance companies or documentary makers, regardless of whether he was guilty or innocent of this particular matter.
Why did the Slick's job have to be done in such an uncharacteristic hurry?
If Slick's was done for the benefit of the camera, and even if it was fake, why not make it look good on camera, like the other jobs?
Why did Kasper not want the camera to see the money at Slick's?
It wasn't that he was unhappy with them filming him doing the job per se---he was apparently fine with that (and under the framing-Uschev-for-his-own-death hypothesis, he would have *needed* them to film it). Only the money shot bothered him. Perhaps because it was a small amount, which he realized might make it obvious to the filmmakers/cops that it was not the sort of job he would have usually bothered with. Of course, we were already suspicious of this from the fact that the job was so obviously rushed, but Kasper might have thought he covered that up plausibly enough.
Why the two-month hiatus after Slick's, followed by willingness to let them film the Cinemark job?
Waiting for the hunting season to get some blood? Or was the camera supposed to see something: something which it failed to see at Slick's, and which took a while to set up for it to see in Cinemark?
Did Larry get out of prison earlier than his projected 3 years? If so, how?
Perhaps it was something to do with the cases that were cleared up when police received the Kasper Karr evidence. This might in turn suggest that the motive for staging the whole thing was to get Larry out. But if so, how did that work? Was the timing (the two-month delay) crucial to this in some way? Larry told a story about convicts who had their loot hidden somewhere outside, waiting for them. Did that apply to him?
Did Kasper Karr die?
The replaying of selected quotes at the end is clearly meant to make us think not. First there was "you were getting too close"---to what? Then there's "I'm two steps ahead of you", and the bit where he said he could have been anything (a plumber, a doctor, etc.) and that when it's time to be something else, he'd be ready to move on. This last quote might even suggest he was never really a burglar, but rather a character only created for the camera, for the purposes of the con (although if so, how did he get so skilled and professional at burglary?)
The hunting scenes might have been included to suggest a source for blood to be used in faking his death. This does imply incompetence on the part of the police, and although that is pretty much how the police are portrayed throughout the film, would Kaspar really have gambled on their not testing it? One must surely assume by default that blood at a crime scene would be tested for a DNA match with known individuals.
If Uschev did kill him, why hide the body but leave the blood? Either he would leave the body to be found, thereby broadcasting the message that he's not to be crossed, or he would remove all the evidence. Blood but no body points to a faked death.